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ABSTRACT

Numerous studies were executed in last 20 years to analyse the bending resistance of beam-to-column joints. The component method described in EN1993-1-8:2005 [1] was developed for the beam-to-column steel joints between H and I-profiles and loaded in bending and shear. The resistances are determined for separated components. The compression side resistance of the joint is limited by the shear panel resistance. The influence of the size of the web panel to the quality of prediction by simplified models were studied by Standig [2] and Brandonisio [3]. In reality and in general description of component method the web panel and connections are separated. A simplified procedure is offered in EN 1993-1-8:2005, which is condensing the shear panel and connections into one spring. The shear resistance is described in 6.2.6.1.(2) and the acting forces in 5.3.(3). The distribution of deformations/forces to springs is modelled by β factor, which depends on loading conditions. The web panel and the connection are separated in the proposal of the second draft of EN1993-1-8:2017 [4]. Both concepts, separated and integrated, may have an influence on the joint resistance. A comparison of the results of the proposal of the second draft of EN1993-1-8:2017 with the separated solution according to EN1993-1-8:2005 with the condensed solution to the component based FEM (CBFEM) on the bending moment resistance is prepared for an unsymmetrical joint with the extended end plate connection.